User`s guide

Components of the Network Model
4-4
8000-A2-GB21-10
June 1997
In this illustration:
 The local router does an ARP request for the ES.
 The DSL card receives the broadcast ARP request. The DSL card does an
ARP reply for the ES by replying with its own MAC address. Addresses for
which the DSL card will proxy ARP must be configured as part of static route
configuration. See the
HotWire Digital Subscriber Line Access Multiplexer
(DSLAM) User’s Guide
for more information.
 When the local router receives the ARP reply, it sends the packet to the DSL
card, and the DSL card forwards it to the ES.
NOTE:
In certain network configurations, the use of proxy ARP on the DSL cards will
cause HP OpenView to log a major event. This will happen since HP
OpenView received the same IP address from two different MAC addresses.
By default, the HP OpenView system logs and displays all events. However,
you may elect to filter specific unwanted events. Instructions on how to filter
out these events are dependent on the release of HP OpenView/Netview that
you are running. For detailed instructions, see the appropriate HP OpenView
user documentation.
HotWire 5446 RTU Proxy ARP
The HotWire 5446 RTU utilizes proxy ARP to enable connectivity between end
systems that are attached to separate RTUs, but reside on the same subnetwork.
The HotWire 5446 RTU will proxy ARP for the end-user system that is physically
connected to another HotWire 5446 RTU where the destination end-user system
is logically connected to the same subnetwork as the sender end-user system.